Materials Literature
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Chirally stacked N-layer graphene systems with N≥2 exhibit a variety of distinct broken symmetry states in which charge density contributions from different spins and valleys are spontaneously transferred between layers. We explain how these states are distinguished by their charge, spin, and valley Hall conductivitie…
Nematicity, defined as broken rotational symmetry, has recently been observed in competing phases proximate to the superconducting phase in the cuprate high-temperature superconductors. Similarly, the new iron-based high-temperature superconductors exhibit a tetragonal-to-orthorhombic structural transition (i.e., a br…
We have thoroughly investigated the oxygen loss in PrMnO 3 and BaMnO 3 , the end members of the AMnO 3 system, on in situ heating in a reducing atmosphere. This was done to drive some oxygen out from them and thus possibly alter the valence of the Mn cation. Sample characterization was done through X-ray diffraction a…
The inhibitive effect of the Murraya koenigii (curry leaf) leaf extract on the corrosion of mild steel in 1 M HCl was investigated by using weight loss, open circuit potential measurements, potentiostatic polarization techniques, and impedance analysis. The results show that Murraya koenigii extract is an effective co…
Chemical and electrochemical impregnation methods have been developed for the fabrication of manganese dioxide electrodes for electrochemical supercapacitors using Ni plaques as current collectors. The methods enabled the synthesis of manganese dioxide in-situ in pores of Ni plaques. The chemical method was based on t…
1. The basic principles and experimental configurations of neutron diffraction experiments 2. Experimental Procedure for Neutron Protein Crystallography 3. Hydrogen, Protons & Hydration in Bio-macromolecules
Zone refining has been extensively used as a process of final purification of materials. Extensive theoretical and experimental efforts have been made to improve the purification efficiency of zone refining by optimizing parameters such as the length and the number of passes of the liquid zone. In the present study, a…
Chip ignition is one of the important problems in cutting magnesium alloy due to cutting temperature rise, which is mainly caused by the increase of cutting speed. In this article, we measured the mean flank temperature through mounting two K-type thermocouples in workpiece of AM50A magnesium alloy. Effect of cutting…
Based on Quasiparticle Interference(QPI) around a point impurity, we demonstrate an analysis scheme that extracts the lifetime of a quasiparticle by using the Local Density of States(LDOS) data around the impurity in a Scanning Tunneling Microscopy(STM) experiment. This data analysis scheme would augment the Fourier-T…
We discuss a novel genetic algorithm that can be used to find global minima on the potential energy surface of disordered ceramics and alloys using a real-space symmetry adapted crossover. Due to a high number of symmetrically equivalent solutions of many alloys, conventional genetic algorithms using reasonable popula…
BACKGROUND: Polyhydroxyalkanoate (PHA) synthesis regulatory protein PhaR contains a DNA binding domain (DBD) and a PHA granule binding domain (GBD), it anchors to the promoter region of PHA granule-associated protein (PhaP) to repress phaP expression. However, PhaR will bind to PHB granules and be released from phaP p…
Abstract Crystalline tungsten oxide (WO3) nanorods with diameters of approximately 8 nm were prepared using SBA-15 mesoporous silica as a hard template and ammonium metatungstate as a tungsten source, which have larger surface area (ca. 90 m2 g−1) than other WO3 materials and, therefore, exhibit superior photocatalyti…
The proteomes expressed at 4°C and 18°C by the psychrophilic Antarctic bacterium Pseudoalteromonas haloplanktis were compared using two-dimensional differential in-gel electrophoresis with special reference to proteins repressed by low temperatures. Remarkably, the major cold-repressed proteins, almost undetectable at…
We report detailed theoretical investigations of the micro-mechanics and bulk elastic properties of composites consisting of randomly distributed stiff fibers embedded in an elastic matrix in two and three dimensions. Recent experiments published in Physical Review Letters [102, 188303 (2009)] have suggested that the…
Silicon-based quantum cascade lasers (QCLs) offer the prospect of integrating coherent THz radiation sources with silicon microelectronics. Theoretical studies have proposed a variety of n-type SiGe-based heterostructures as design candidates, however the optimal material configuration remains unclear. In this work, a…
We describe experimental and related theoretical work on the measurement of the Casimir force using semiconductor test bodies. This field of research started in 2005 and several important and interesting results have already been obtained. Specifically, the Casimir force or its gradient were measured in the configurat…
Chitosan derivatives, such as chitosan alpha-ketoglutaric acid (KCTS) and hydroxamated chitosan alpha-ketoglutaric acid (HKCTS), are prepared and their coordination behavior toward Ca(II) was studied. The adsorption isotherms were correlated by dc/dt = −kcn at 20°C, 30°C, 40°C, 50°C, and 60°C. By linear correlation, t…
Abstract Hydrogen‐bonded supramolecular polymers were prepared from the derivatives of α‐amino‐ε‐caprolactam (ACL), obtained from a renewable resource. Several self‐complimentary bis‐ or tetra‐caprolactam monomers were synthesized by varying the number of carbons of the spacer between the hydrogen‐bonding end groups.…
Single-crystal Electron Paramagnetic Resonance (EPR) and optical absorption studies were performed at room temperature on Cu(II)-ion–doped bis-glycine sodium nitrate, a semiorganic nonlinear optical material (NLO). Spin-Hamiltonian parameters, obtained from single-crystal EPR spectra, recorded in three mutually orthog…
Scanning electron microscope (SEM) is a typical means to take an image of material surfaces. Enhancing the resolution of surface images is complicated by the presence of complex SEM components. SEM characteristics are studied as a function of its component by means of a statistical factor analysis as well as by constr…